Whats the difference between a sycamine tree and a mulberry tree?

Answer 1

The sycamine tree and the mulberry tree were very similar in appearance; the two trees even produced a fruit that looked identical. However, the fruit of the sycamine tree was extremely bitter. Its fruit looked just as luscious and delicious as a mulberry fig. But when a person tasted the sycamine fig, he discovered that it was horribly bitter.

Mulberry figs were delicious and therefore expensive. Because of the cost of this fruit, it was primarily eaten by wealthier people. But the sycamine fig was cheap and therefore affordable to poorer people. Because the poor couldn't afford the luscious mulberry fig, they munched on the sycamine fig as a substitute.